au pair

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++au pair /əʊ ˈpeə $ oʊ ˈper/ noun [countable]  FAMILYa young person, usually a woman, who stays with a family in a foreign country to learn the language, and looks after their children for a small wage 换工互惠生，寄居生〔通常为女性，住在外国家庭里学习外语并帮助照看孩子〕

Examples from the Corpus

au pair• The au pair may have a different view of her status in the household than her employers do.Origin au pair (1800-1900) French “on equal terms”

au pair nounChinese  

Corpus who person, a usually with young a a stays woman,

au pair
au pair /əʊ ˈpeə $ oʊ ˈper/ noun [countable]a young person, usually a woman, who stays with a family in a foreign country to learn the language, and looks after their children for a small wage

au pairBrE /ˌəʊ ˈpeə(r)/ 🔊NAmE /ˌoʊ ˈper/ 🔊 nouna young person, usually a woman, who lives with a family in a foreign country in order to learn the language. An au pair helps in the house and takes care of children and receives a small wage. 互惠（女）生（住国外家庭，以劳动换取食宿并学习语言）